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US RE34,598 EGranted
Highly pure titanium
AssigneeKabushiki Kaisha Toshiba
InventorsKazumi Shimotori, Yoshiharu Ochi, Hideo Ishihara, Takenori Umeki, Takashi Ishigami
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Abstract
Disclosed is a highly pure titanium which comprises containing not more than 200 ppm of oxygen; not more than 30 ppm each of elements consisting of iron, nickel and chromium, and not more than 0.1 ppm each of elements consisting of sodium and potassium. Disclosed is also a process for preparing the above highly pure titanium which comprises melting a crude titanium obtained by molten salt electrolysis, in a high vacuum of 5.times.10.sup.-5 mbar or less.
Claims80
A highly pure titanium comprising not more than 200 ppm of oxygen;
- not more than 30 ppm each of elements consisting of iron, nickel and chromium, and not more than 0.1 ppm each of elements consisting of sodium and potassium, wherein said highly pure titanium has a residual resistance ratio RRR.sub.273 of 45 or more.
Dependencies are inferred from the claim text.